What are the three characteristics of similar figures?

Three characteristics of similar figures

1). Similar figures have same shape but not same size at all time

     Same shape means looking same, identical the difference may be the size of figures.

2). In similar figures corresponding sides are in same ratio

3). Corresponding angles  are equal

For example, all circles are similar only difference is size of circle,all squares are similar.  

These are the three characteristics of similar figures

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answer:

c. the third graph